Freehand cleans edges for all 5 knives: Which knife will be most difficult and time consumming?
(a) less than 1 minute
(b) less than 2 minutes
(c) less than 5 minutes
(d) less than 10 minutes
(e) 10+ minutes
(f) failed (rounded/chipped/44mag-it)

For me, D2@58hrc and (b). (a) for most others.

Seriously, please show us your predictable (deterministic) way to do this. i.e. Do this & that within a single digit minutes, voi'la a wire/burr free edge.